Straight tunnel



FIG. 1 is a front elevational view of straight tunnel

FIG. 2 is a top plan view thereof;

FIG. 3 is a rear side elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a front and side perspective view thereof; and,

FIG. 8 is a rear and side perspective view of straight tunnel. 

The ornamental design for straight tunnel, as shown and described. 